[SOLVED] linkButton: passing variables

I am trying to pass variables through linkButton, but nothing is reaching my controller.

View:

<?php echo CHtml::linkButton('Approve', array(

         'submit'=>array('comment/approve','id'=>$data->id),

	 'params'=>array('CommentId' => $data->CommentId),

)); ?>

Controller: Result is NULL

var_dump($_GET['CommentId']);

die();

What am I missing here?

Should have been using $_POST

var_dump($_POST['CommentId']);